Abstract:
This study aims to determine the effect of watching English language YouTube
channels on student' Vocabulary mastery achievement at MTS Kesuma LKMD Namorambe.
The population of this study were student in class VIII A and VIII B, who were taken from
two classes. The sample consisted of 96 students which were taken by random sampling
technique and divided into two different groups namely experimental and control groups. In
analyzing the data obtained from the results of the study was analyzed using descriptive and
inferential statistics. Data collected comparisons were made in the form of pretest scores and
post test scores. Then the two scores were compared to know a difference between the pretest
score and the Post test score Test ("t-test") tests of score differences are only carried out on
the average of the two scores, for which a technique called the t-test is used. Therefore, there
was One Group Pretest and Post test. This research found that t observation (2021). This is
higher than the t table (86.77) from hypothesis testing, so it can be said that there is an effect
of teaching using English language YouTube channels on student achievement in vocabulary
mastery in class VIII MTS Kesuma LKMD Namorambe students.
